80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/* pvControl.cpp */
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/*
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* Copyright information and license terms for this software can be
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* found in the file LICENSE that is included with the distribution
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*/
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/**
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* @author mrk
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*/
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#include <string>
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#include <stdexcept>
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#define epicsExportSharedSymbols
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#include <pv/pvType.h>
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#include <pv/pvIntrospect.h>
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#include <pv/pvData.h>
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#include <pv/pvControl.h>
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namespace epics { namespace pvData {
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using std::tr1::static_pointer_cast;
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using std::string;
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string PVControl::noControlFound("No control structure found");
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string PVControl::notAttached("Not attached to an control structure");
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bool PVControl::attach(PVFieldPtr const & pvField)
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{
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if(pvField->getField()->getType()!=structure) return false;
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PVStructurePtr pvStructure = static_pointer_cast<PVStructure>(pvField);
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pvLow = pvStructure->getSubField<PVDouble>("limitLow");
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if(pvLow.get()==NULL) return false;
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pvHigh = pvStructure->getSubField<PVDouble>("limitHigh");
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if(pvHigh.get()==NULL) {
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pvLow.reset();
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return false;
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}
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pvMinStep = pvStructure->getSubField<PVDouble>("minStep");
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if(pvMinStep.get()==NULL) {
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pvLow.reset();
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pvHigh.reset();
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return false;
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}
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return true;
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}
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void PVControl::detach()
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{
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pvLow.reset();
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pvHigh.reset();
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}
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bool PVControl::isAttached(){
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if(pvLow.get()==NULL) return false;
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return true;
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}
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void PVControl::get(Control &control) const
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{
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if(pvLow.get()==NULL) {
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throw std::logic_error(notAttached);
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}
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control.setLow(pvLow->get());
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control.setHigh(pvHigh->get());
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control.setMinStep(pvMinStep->get());
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}
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bool PVControl::set(Control const & control)
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{
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if(pvLow.get()==NULL) {
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throw std::logic_error(notAttached);
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}
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if(pvLow->isImmutable() || pvHigh->isImmutable() || pvMinStep->isImmutable()) return false;
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pvLow->put(control.getLow());
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pvHigh->put(control.getHigh());
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pvMinStep->put(control.getMinStep());
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return true;
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}
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}}
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